Product Code: ICAL08_2106

Laser Net Shape Manufacturing of Rene195
Authors:
Yong Liu, GE; 0 CO Peoples Republic of China
Presented at ICALEO 2008

Rene 195 is a nickel-based superalloy that was used as the advanced tip material of the high pressure turbine blades of aircraft engines because of its excellent oxidation resistance. However, due to poor weldability of this material, it's very difficult to acquire crack free Rene 195 tip through laser powder deposition. In this paper, Laser Net Shape Manufacturing (LNSM) has been applied for Rene 195 deposition. The key processing parameters were correlated with solidification microstructure and optimized process window was obtained for crack free deposition.
In order to improve process robustness, a vision and temperature bases closed-loop control system for laser deposition has been developed and integrated into the LNSM system, which could achieve real-time monitoring and control of the weld pool and temperature to ensure robust process and expected microstructure.